SSSD 5.25 with 18 sectors pulses Index too slow

HxC Floppy Emulator on IBM PC and compatible support
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MECCABINGO
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Joined: Mon Jan 03, 2022 12:27 am

SSSD 5.25 with 18 sectors pulses Index too slow

Post by MECCABINGO »

USB Rev D Cased

A 5.25" floppy at 300rpm should generate an index pulse every 200mS
If I create a SSSD Blank floppy with 18 secotors per track, which I think is fine,

Image

I get an index pulse every 400mS.

Image

If I reduce the sectors to 9, it behaves and gives 200mS.

Have I done something wrong, or is the emulator misbehaving?

Regards

Keith

Jeff
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Re: SSSD 5.25 with 18 sectors pulses Index too slow

Post by Jeff »

You need to set the bitrate at 250000 kbits/s. (In FM you need a data bit + a clock bit. So to have a 125000 kbits/s data rate you need to double the bitrate (data + clock))

MECCABINGO
Posts: 2
Joined: Mon Jan 03, 2022 12:27 am

Re: SSSD 5.25 with 18 sectors pulses Index too slow

Post by MECCABINGO »

Many thanks! Good things are happening at 250,000.

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